[440] | 1 | #ifndef _ViewCellsManager_H__
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| 2 | #define _ViewCellsManager_H__
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| 3 |
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| 4 | #include "Ray.h"
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| 5 | #include "VssRay.h"
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| 6 | #include "Containers.h"
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[475] | 7 | #include "ViewCell.h"
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[440] | 8 |
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| 9 | class ViewCell;
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| 10 | class Intersectable;
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| 11 | class RenderSimulator;
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[480] | 12 | class Renderer;
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[440] | 13 | class Mesh;
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| 14 | struct Triangle3;
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| 15 | class SimulationStatistics;
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| 16 | class BspTree;
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| 17 | class KdTree;
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| 18 | class VspKdTree;
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| 19 | class VspBspTree;
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| 20 | class KdNode;
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| 21 | class KdLeaf;
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| 22 | class VspKdTree;
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| 23 | class AxisAlignedBox3;
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[448] | 24 | class BspLeaf;
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[475] | 25 | class ViewCellsStatistics;
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[482] | 26 | class Exporter;
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[503] | 27 |
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[475] | 28 | struct BspRay;
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| 29 |
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[440] | 30 | /**
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| 31 | Manages different higher order operations on the view cells.
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| 32 | */
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| 33 | class ViewCellsManager
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| 34 | {
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| 35 |
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| 36 | public:
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[467] | 37 | struct PvsStatistics {
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| 38 | int minPvs;
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| 39 | int maxPvs;
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| 40 | float avgPvs;
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| 41 | int viewcells;
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| 42 | };
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[466] | 43 |
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| 44 | /// view cell container types
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| 45 | enum {BSP, KD, VSP_KD, VSP_BSP};
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| 46 |
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[440] | 47 | /** Constructor taking the maximal number of samples used for construction
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| 48 | */
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| 49 | ViewCellsManager(const int constructionSamples);
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| 50 |
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| 51 | ViewCellsManager();
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| 52 |
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[462] | 53 | virtual ~ViewCellsManager();
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[440] | 54 |
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| 55 | /** Constructs view cell container with a given number of samples.
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| 56 | */
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| 57 | virtual int Construct(const ObjectContainer &objects,
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[487] | 58 | const VssRayContainer &rays) = 0;
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[440] | 59 |
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[441] | 60 | /** Computes sample contributions of the rays to the view cells PVS.
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| 61 |
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| 62 | @param rays bundle of rays used to find intersections with view cells and
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| 63 | adding the contribution
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| 64 | @param castRays true if ray should be cast to gain the information, false if rays
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| 65 | already hold the view cells intersection information and need not be recast.
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| 66 | @param sampleContributions returns the number of sample contributions
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| 67 | @param contributingSamples returns the number of contributingSamples
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[440] | 68 | */
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[475] | 69 | void ComputeSampleContributions(const VssRayContainer &rays);
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[440] | 70 |
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[441] | 71 |
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[475] | 72 | /** Computes sample contribution of a simgle ray to the view cells PVS.
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| 73 | @param ray finds intersections with view cells and holds the contribution
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| 74 | @param castRay true if ray should be cast to gain the information, false if ray
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| 75 | is already holding the information and need not be recast.
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[466] | 76 |
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[475] | 77 | @returns number of sample contributions
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| 78 | */
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| 79 | virtual void ComputeSampleContributions(VssRay &ray);
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[466] | 80 |
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[452] | 81 | /** Prints out statistics of the view cells.
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| 82 | */
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[475] | 83 | virtual void PrintStatistics(ostream &s) const;
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[452] | 84 |
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[440] | 85 | /** Post processes view cells givemŽa number of rays.
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| 86 | */
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[475] | 87 | virtual int PostProcess(const ObjectContainer &objects,
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| 88 | const VssRayContainer &rays) = 0;
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[440] | 89 |
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| 90 | /** Show visualization of the view cells.
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| 91 | */
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| 92 | virtual void Visualize(const ObjectContainer &objects,
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[466] | 93 | const VssRayContainer &sampleRays) = 0;
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[440] | 94 |
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| 95 | /** type of the view cell container.
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| 96 | */
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| 97 | virtual int GetType() const = 0;
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| 98 |
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[463] | 99 | /** Load the input viewcells. The input viewcells should be given as a collection
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| 100 | of meshes. Each mesh is assume to form a bounded polyhedron defining the interior of
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| 101 | the viewcell. The method then builds a BSP tree of these view cells.
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| 102 |
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| 103 | @param filename file to load
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| 104 | @return true on success
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| 105 | */
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[440] | 106 | bool LoadViewCells(const string filename);
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| 107 |
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| 108 | /** Constructs view cell from base triangle. The ViewCell is extruded along the normal vector.
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| 109 | @param the base triangle
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| 110 | @param the height of the newly created view cell
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| 111 | */
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| 112 | ViewCell *ExtrudeViewCell(const Triangle3 &baseTri, const float height) const;
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| 113 |
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| 114 | /** Merges two view cells.
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| 115 | @note the piercing rays of the front and back will be ordered
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| 116 | @returns new view cell based on the merging.
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| 117 | */
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[441] | 118 | ViewCell *MergeViewCells(ViewCell &front, ViewCell &back) const;
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[440] | 119 |
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| 120 | /** Generates view cell of type specified by this manager
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| 121 | */
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| 122 | virtual ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 123 |
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| 124 | /** Adds a new view cell to the list of predefined view cells.
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| 125 | */
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| 126 | void AddViewCell(ViewCell *viewCell);
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| 127 |
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| 128 | /** Derive view cells from objects.
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| 129 | */
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| 130 | void DeriveViewCells(const ObjectContainer &objects,
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| 131 | ViewCellContainer &viewCells,
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| 132 | const int maxViewCells) const;
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| 133 |
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| 134 | /** Sets maximal number of samples used for the
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| 135 | construction of the view cells.
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| 136 | */
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| 137 | void SetVisualizationSamples(const int visSamples);
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| 138 |
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| 139 | /** Sets maximal number of samples used for the visualization of the view cells.
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| 140 | */
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| 141 | void SetConstructionSamples(const int constructionSamples);
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| 142 |
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| 143 | /** Sets maximal number of samples used for the post processing of the view cells.
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| 144 | */
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| 145 | void SetPostProcessSamples(const int postProcessingSamples);
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| 146 |
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| 147 | /** See set.
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| 148 | */
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| 149 | int GetVisualizationSamples() const;
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| 150 |
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| 151 | /** See set.
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| 152 | */
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| 153 | int GetConstructionSamples() const;
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| 154 |
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| 155 | /** See set.
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| 156 | */
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| 157 | int GetPostProcessSamples() const;
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| 158 |
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| 159 | /** Returns true if view cells wer already constructed.
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| 160 | */
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| 161 | virtual bool ViewCellsConstructed() const = 0;
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[441] | 162 |
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[477] | 163 | /** cast line segment to get a list of unique viewcells which are intersected
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| 164 | by this line segment
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| 165 | */
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[466] | 166 |
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[477] | 167 | virtual int CastLineSegment(const Vector3 &origin,
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[466] | 168 | const Vector3 &termination,
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| 169 | ViewCellContainer &viewcells
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| 170 | ) = 0;
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| 171 |
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[477] | 172 | virtual void GetPvsStatistics(PvsStatistics &stat);
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[466] | 173 |
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[503] | 174 | /** Get a viewcell containing the specified point */
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| 175 | virtual ViewCell *GetViewCell(const Vector3 &point) = 0;
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[492] | 176 |
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[503] | 177 | virtual void PrintPvsStatistics(ostream &s);
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[467] | 178 |
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[477] | 179 | /** Returns probability that view point lies in one view cell.
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| 180 | */
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| 181 | virtual float GetProbability(ViewCell *viewCell) = 0;
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[468] | 182 |
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[477] | 183 | /** Returns render cost of a single view cell given the render cost of an object.
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| 184 | */
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| 185 | virtual float GetRendercost(ViewCell *viewCell, float objRendercost) const = 0;
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[468] | 186 |
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[477] | 187 | /** Returns vector of loaded / generated view cells.
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| 188 | */
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| 189 | ViewCellContainer &GetViewCells();
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[468] | 190 |
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[485] | 191 | /** Helper function used to split ray sets uniformly
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| 192 | into one that is currently used and the other that
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| 193 | is saved for later processing.
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| 194 | @param sourceRays the input ray set
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| 195 | @param maxSize the maximal number of rays that will be used
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| 196 | @param usedRays returns the used ray set
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| 197 | @param savedRays if not null, returns the saved ray set
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[477] | 198 | */
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| 199 | void GetRaySets(const VssRayContainer &sourceRays,
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[485] | 200 | const int maxSize,
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| 201 | VssRayContainer &usedRays,
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| 202 | VssRayContainer *savedRays = NULL) const;
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| 203 |
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[480] | 204 | /** Returns accumulated area of all view cells.
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| 205 | */
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| 206 | float GetAccVcArea();
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[470] | 207 |
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[480] | 208 | /** Returns area of one view cell.
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| 209 | */
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| 210 | virtual float GetArea(ViewCell *viewCell) const;
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[470] | 211 |
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[480] | 212 | /** Returns volume of view cells.
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| 213 | */
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| 214 | virtual float GetVolume(ViewCell *viewCell) const;
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[470] | 215 |
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[480] | 216 | virtual AxisAlignedBox3 GetSceneBbox() const = 0;
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[477] | 217 |
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[480] | 218 | /** Sets the current renderer mainly for view cells statistics.
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| 219 | */
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| 220 | void SetRenderer(Renderer *renderer);
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| 221 |
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[487] | 222 | /** Computes a (random) view point in the valid view space.
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| 223 | @returns true if valid view point was found
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| 224 | */
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| 225 | virtual bool GetViewPoint(Vector3 &viewPoint) const;
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| 226 |
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[490] | 227 | /** Returns true if this view point is in the valid view space.
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| 228 | */
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| 229 | virtual bool ViewPointValid(const Vector3 &viewPoint) const;
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| 230 |
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[487] | 231 | /** Sets a view space boundary.
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| 232 | */
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| 233 | void SetViewSpaceBox(const AxisAlignedBox3 &box);
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| 234 |
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[503] | 235 | /** Creates mesh for this view cell.
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| 236 | */
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| 237 | virtual void CreateMesh(ViewCell *vc) = NULL;
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[487] | 238 |
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[469] | 239 | protected:
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[480] | 240 |
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[482] | 241 | void ParseEnvironment();
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| 242 |
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[480] | 243 | /** Recollects view cells and resets statistics.
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| 244 | */
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| 245 | void ResetViewCells();
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[482] | 246 |
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[480] | 247 | /** Collects the view cells in the view cell container.
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| 248 | */
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| 249 | virtual void CollectViewCells() = 0;
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[482] | 250 |
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[479] | 251 | /** Evaluates view cells statistics and stores it in
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| 252 | mViewCellsStatistics.
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| 253 | */
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| 254 | void EvaluateViewCellsStats();
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[482] | 255 |
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| 256 |
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| 257 | //-- helper functions for view cell visualization
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| 258 |
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| 259 | /** Exports the view cell partition.
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| 260 | */
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| 261 | void ExportViewCells(Exporter *exporter) const;
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| 262 |
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| 263 | /** Sets exporter color.
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| 264 | */
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| 265 | virtual void ExportColor(Exporter *exporter, ViewCell *vc) const = 0;
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| 266 |
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| 267 | /** Exports view cell geometry.
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| 268 | */
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[485] | 269 | virtual void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const = 0;
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[482] | 270 |
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[503] | 271 | /** Creates meshes from the view cells.
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| 272 | */
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| 273 | void CreateViewCellsMeshes();
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| 274 |
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[489] | 275 | /// the view cell corresponding to space ouside the valid view space
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| 276 | //ViewCell *mOutOfBoundsCell;
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[440] | 277 |
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[480] | 278 | /// Renders the view cells.
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| 279 | Renderer *mRenderer;
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[440] | 280 |
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| 281 | /// Loaded view cells
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[469] | 282 | ViewCellContainer mViewCells;
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[440] | 283 |
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| 284 | /// maximum number of samples taken for construction of the view cells
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| 285 | int mConstructionSamples;
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| 286 | int mPostProcessSamples;
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| 287 | int mVisualizationSamples;
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[441] | 288 |
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[463] | 289 | //-- thresholds used for view cells merge
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| 290 | int mMinPvsDif;
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| 291 | int mMinPvs;
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[441] | 292 | int mMaxPvs;
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[470] | 293 |
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| 294 | float mTotalAreaValid;
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| 295 | float mTotalArea;
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[475] | 296 |
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| 297 | ViewCellsStatistics mViewCellsStats;
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[487] | 298 | /// the scene bounding box
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| 299 | AxisAlignedBox3 mSceneBox;
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| 300 |
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[503] | 301 | MeshContainer mMeshContainer;
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| 302 |
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[487] | 303 | //-- visualization options
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| 304 |
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| 305 | /// color code for view cells
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| 306 | int mColorCode;
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| 307 | bool mExportGeometry;
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| 308 | bool mExportRays;
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[440] | 309 | };
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| 310 |
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[441] | 311 |
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| 312 |
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[440] | 313 | /**
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| 314 | Manages different higher order operations on the view cells.
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| 315 | */
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| 316 | class BspViewCellsManager: public ViewCellsManager
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| 317 | {
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| 318 |
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| 319 | public:
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[485] | 320 | /** Constructor taking the bsp tree and the number of samples
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| 321 | used to construct the bsp tree.
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| 322 | */
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[440] | 323 | BspViewCellsManager(BspTree *tree, int constructionSamples);
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| 324 |
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[477] | 325 | ~BspViewCellsManager();
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| 326 |
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[440] | 327 | int Construct(const ObjectContainer &objects,
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[487] | 328 | const VssRayContainer &rays);
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[440] | 329 |
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| 330 |
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| 331 | int PostProcess(const ObjectContainer &objects,
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[466] | 332 | const VssRayContainer &rays);
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[440] | 333 |
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| 334 | void Visualize(const ObjectContainer &objects,
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[466] | 335 | const VssRayContainer &sampleRays);
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[440] | 336 |
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| 337 | int GetType() const;
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| 338 |
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| 339 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 340 |
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| 341 | bool ViewCellsConstructed() const;
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| 342 |
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[475] | 343 | //void PrintStatistics(ostream &s) const;
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[452] | 344 |
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[468] | 345 | int CastLineSegment(const Vector3 &origin,
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| 346 | const Vector3 &termination,
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| 347 | ViewCellContainer &viewcells);
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| 348 |
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[471] | 349 | float GetProbability(ViewCell *viewCell);
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[469] | 350 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[466] | 351 |
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[477] | 352 | AxisAlignedBox3 GetSceneBbox() const;
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| 353 |
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[503] | 354 | /** Get a viewcell containing the specified point */
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| 355 | ViewCell *GetViewCell(const Vector3 &point);
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[492] | 356 |
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[503] | 357 | void CreateMesh(ViewCell *vc);
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| 358 |
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[440] | 359 | protected:
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| 360 |
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[480] | 361 | void CollectViewCells();
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| 362 |
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[441] | 363 | /** Merges view cells front and back leaf view cell.
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| 364 | */
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| 365 | bool MergeBspLeafViewCells(BspLeaf *front, BspLeaf *back) const;
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[440] | 366 |
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[441] | 367 | /** Returns true if front and back leaf should be merged.
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| 368 | */
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| 369 | bool ShouldMerge(BspLeaf *front, BspLeaf *back) const;
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| 370 |
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[477] | 371 | void ConstructBspRays(const VssRayContainer &rays,
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| 372 | const int numSamples);
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[482] | 373 |
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| 374 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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[485] | 375 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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[482] | 376 |
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[440] | 377 | /// the BSP tree.
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| 378 | BspTree *mBspTree;
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[475] | 379 |
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| 380 | vector<BspRay *> mBspRays;
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[440] | 381 |
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| 382 | private:
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| 383 |
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| 384 | /** Exports visualization of the BSP splits.
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| 385 | */
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[477] | 386 | void ExportSplits(const ObjectContainer &objects);
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[440] | 387 |
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| 388 | /** Exports visualization of the BSP PVS.
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| 389 | */
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[477] | 390 | void ExportBspPvs(const ObjectContainer &objects);
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[440] | 391 |
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| 392 | };
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| 393 |
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| 394 | /**
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| 395 | Manages different higher order operations on the KD type view cells.
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| 396 | */
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| 397 | class KdViewCellsManager: public ViewCellsManager
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| 398 | {
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| 399 |
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| 400 | public:
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| 401 |
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| 402 | KdViewCellsManager(KdTree *tree);
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| 403 |
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| 404 | int Construct(const ObjectContainer &objects,
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[487] | 405 | const VssRayContainer &rays);
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[440] | 406 |
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[478] | 407 | int CastLineSegment(const Vector3 &origin,
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| 408 | const Vector3 &termination,
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| 409 | ViewCellContainer &viewcells);
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[440] | 410 |
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| 411 | int PostProcess(const ObjectContainer &objects,
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[466] | 412 | const VssRayContainer &rays);
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[440] | 413 |
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| 414 | void Visualize(const ObjectContainer &objects,
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[466] | 415 | const VssRayContainer &sampleRays);
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[440] | 416 |
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| 417 | int GetType() const;
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| 418 |
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| 419 | bool ViewCellsConstructed() const;
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| 420 |
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| 421 |
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[452] | 422 | /** Prints out statistics of this approach.
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| 423 | */
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[503] | 424 | // virtual void PrintStatistics(ostream &s) const;
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| 425 | ViewCell *GetViewCell(const Vector3 &point) { return NULL; }
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[452] | 426 |
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[503] | 427 | float GetProbability(ViewCell *viewCell);
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| 428 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[492] | 429 |
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[503] | 430 | AxisAlignedBox3 GetSceneBbox() const;
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[468] | 431 |
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[503] | 432 | void CreateMesh(ViewCell *vc);
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| 433 |
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[440] | 434 | protected:
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| 435 |
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[480] | 436 | void CollectViewCells();
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| 437 | KdNode *GetNodeForPvs(KdLeaf *leaf);
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[440] | 438 |
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[482] | 439 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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[485] | 440 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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[440] | 441 |
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[480] | 442 | /// the BSP tree.
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| 443 | KdTree *mKdTree;
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[440] | 444 |
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[480] | 445 | /// depth of the KD tree nodes with represent the view cells
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| 446 | int mKdPvsDepth;
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[440] | 447 | };
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| 448 |
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| 449 | /**
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| 450 | Manages different higher order operations on the view cells
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| 451 | for vsp kd tree view cells.
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| 452 | */
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| 453 | class VspKdViewCellsManager: public ViewCellsManager
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| 454 | {
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| 455 |
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| 456 | public:
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| 457 |
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| 458 | VspKdViewCellsManager(VspKdTree *vspKdTree, int constructionSamples);
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| 459 |
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| 460 | int Construct(const ObjectContainer &objects,
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[487] | 461 | const VssRayContainer &rays);
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[440] | 462 |
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| 463 |
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| 464 | int PostProcess(const ObjectContainer &objects,
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[466] | 465 | const VssRayContainer &rays);
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[440] | 466 |
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| 467 | void Visualize(const ObjectContainer &objects,
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[466] | 468 | const VssRayContainer &sampleRays);
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[440] | 469 |
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| 470 | int GetType() const;
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| 471 |
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| 472 | bool ViewCellsConstructed() const;
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| 473 |
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[475] | 474 | //virtual void PrintStatistics(ostream &s) const;
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[440] | 475 |
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[462] | 476 | ViewCell *GenerateViewCell(Mesh *mesh) const;
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| 477 |
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[466] | 478 |
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| 479 | int CastLineSegment(const Vector3 &origin,
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| 480 | const Vector3 &termination,
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[468] | 481 | ViewCellContainer &viewcells);
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[466] | 482 |
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[503] | 483 | ViewCell *GetViewCell(const Vector3 &point) { return NULL; }
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[492] | 484 |
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[471] | 485 | float GetProbability(ViewCell *viewCell);
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[469] | 486 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[468] | 487 |
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[477] | 488 | AxisAlignedBox3 GetSceneBbox() const;
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[503] | 489 |
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| 490 | void CreateMesh(ViewCell *vc);
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| 491 |
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[440] | 492 | protected:
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| 493 |
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[482] | 494 | void ExportLeaves(const ObjectContainer &objects,
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| 495 | const VssRayContainer &sampleRays);
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| 496 |
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[480] | 497 | void CollectViewCells();
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| 498 |
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[482] | 499 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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[485] | 500 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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[482] | 501 |
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| 502 |
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[440] | 503 | /// the BSP tree.
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| 504 | VspKdTree *mVspKdTree;
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| 505 | };
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| 506 |
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| 507 |
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[442] | 508 |
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| 509 | /**
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| 510 | Manages different higher order operations on the view cells.
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| 511 | */
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| 512 | class VspBspViewCellsManager: public ViewCellsManager
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| 513 | {
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| 514 |
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| 515 | public:
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| 516 |
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| 517 | VspBspViewCellsManager(VspBspTree *tree, int constructionSamples);
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[475] | 518 | ~VspBspViewCellsManager();
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[442] | 519 |
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| 520 | int Construct(const ObjectContainer &objects,
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[487] | 521 | const VssRayContainer &rays);
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[442] | 522 |
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| 523 | int PostProcess(const ObjectContainer &objects,
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[466] | 524 | const VssRayContainer &rays);
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[442] | 525 |
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| 526 | void Visualize(const ObjectContainer &objects,
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[466] | 527 | const VssRayContainer &sampleRays);
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[442] | 528 |
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| 529 | int GetType() const;
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| 530 |
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| 531 | ViewCell *GenerateViewCell(Mesh *mesh = NULL) const;
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| 532 |
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| 533 | bool ViewCellsConstructed() const;
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| 534 |
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[468] | 535 |
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| 536 | int CastLineSegment(const Vector3 &origin,
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| 537 | const Vector3 &termination,
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| 538 | ViewCellContainer &viewcells);
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[452] | 539 |
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[471] | 540 | float GetProbability(ViewCell *viewCell);
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[469] | 541 | float GetRendercost(ViewCell *viewCell, float objRendercost) const;
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[479] | 542 |
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[477] | 543 | AxisAlignedBox3 GetSceneBbox() const;
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[503] | 544 |
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| 545 | ViewCell *GetViewCell(const Vector3 &point);
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[477] | 546 |
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[487] | 547 | bool GetViewPoint(Vector3 &viewPoint) const;
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| 548 |
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[490] | 549 | bool ViewPointValid(const Vector3 &viewPoint) const;
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[503] | 550 |
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| 551 | void CreateMesh(ViewCell *vc);
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| 552 |
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[442] | 553 | protected:
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[475] | 554 |
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[503] | 555 | /** Merges the view cells.
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[442] | 556 | */
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[503] | 557 | void MergeViewCells(const VssRayContainer &rays, const ObjectContainer &objects);
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| 558 |
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| 559 | void RefineViewCells(const VssRayContainer &rays);
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[442] | 560 |
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[480] | 561 | void CollectViewCells();
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| 562 |
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[482] | 563 | /** Returns maximal depth difference of view cell
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| 564 | leaves in tree.
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| 565 | */
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| 566 | int GetMaxTreeDiff(ViewCell *vc) const;
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[485] | 567 |
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[482] | 568 |
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[485] | 569 | void ExportColor(Exporter *exporter, ViewCell *vc) const;
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| 570 | void ExportVcGeometry(Exporter *exporter, ViewCell *vc) const;
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| 571 |
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| 572 |
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[442] | 573 | /// the view space partition BSP tree.
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| 574 | VspBspTree *mVspBspTree;
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| 575 |
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| 576 | private:
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| 577 |
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| 578 | /** Exports visualization of the BSP splits.
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| 579 | */
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[485] | 580 | void ExportSplits(const ObjectContainer &objects,
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| 581 | const VssRayContainer &rays);
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[442] | 582 |
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| 583 | /** Exports visualization of the BSP PVS.
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| 584 | */
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[485] | 585 | void ExportBspPvs(const ObjectContainer &objects,
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| 586 | const VssRayContainer &rays);
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[442] | 587 |
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| 588 | };
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| 589 |
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[440] | 590 | #endif
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